@article{van Leeuwen2002,
author = {van Leeuwen, M.H.D. and Maas, I.},
title= {Partner choice and homogamy in the nineteenth century: was there a sexual revolution in Europe?},
year = {2002},
doi = {10.1353/jsh.2002.0111},
journal = {Journal of Social History},
volume = {36},
pages = {101--123},
}